printable version

Dilution of oil in a petrol engine

If the cylinders receive pereobogaschenie mixture and the engine rarely works at full capacity or not running at full capacity and do not have time to reach operating temperature while driving (urban driving cycle), it is observed as a result of incomplete combustion of fuel.

Soot, oil varnish and other products, unburned fuel, condensation of moisture leading to the formation of turbidity, acidity. Unburned fuel is deposited on the cold cylinder walls, flows into the crankcase, wherein the oil film is washed away from the walls of the cylinders and pistons. As a result, insufficient lubrication of the cylinder walls and oil dilution, lose their properties, which depend on the amount of fuel dissolved therein.

When too much oil dilution require premature replacement.

If heavy traffic (hot engine) fuel contained in the oil evaporates, however, especially in winter (multiple cold start and, as a consequence, high levels of gasoline in oil), requires frequent checking the oil level.